Din7980 Rectangular Section Spring Lock Washer-Helical Spring Lock Washer High Collar

描述

1. Heavy-Duty, Anti-Loosening Performance
   • Conforms to DIN 7980 “high-collar” geometry: a rectangular cross-section coil with extra free height that delivers a larger spring travel than standard split washers, safeguarding preload on high-strength socket-head screws.
   • Quenched-and-tempered alloy / carbon steel (available in class 8.8, 10.9, 12.9 equivalents) is hardened to 39 – 46 HRC (≈ 370 – 470 HV), providing elasticity that withstands cyclic clamp loads without taking a set.
   • Radial bite from the sheared coil ends prevents back-off under vibration, shock, and thermal expansion—verified to retain ≥ 88 % of initial preload after 1 000 transverse-oscillation (Junker) cycles.
   • Standard 8 µm electro-zinc finish with trivalent passivation resists ≥ 120 h neutral salt spray (ISO 9227); clear, yellow, black, olive, or custom RAL / Pantone powder top-coats push corrosion life past 1 000 h and offer instant visual coding.
2. Cross-Industry Application Spectrum
   • Heavy Machinery & Off-Road Vehicles: Locks cylinder-head covers, transmission housings, and hydraulic manifolds exposed to intense vibration and torque reversal.
   • Energy, Mining & Construction: Secures structural joints on wind turbines, crushers, scaffolding, and drilling rigs where service access is difficult and downtime costly.
   • Robotics, Automation & Machine Tools: Maintains clamp integrity on servo-motor mounts, gear-case plates, and linear-guide bolts during rapid acceleration and high cycle counts.
   • Maintenance Kits & DIY Fabrication: Provides reliable anti-slip fastening for steel framing, jigs, and outdoor fixtures subject to weather or chemical splash.
3. Installer-Friendly, Time-Saving Handling
   • High-collar outer diameter nests neatly inside counterbores for socket-head cap screws—no overhang, so assemblies stay flush in tight cavities.
   • Identical tightening torque to plain washers: technicians use standard charts without re-calculation; the washer’s spring action automatically compensates for joint settling.
   • Deburred coil ends feed smoothly through magnetic sockets, vibratory bowls, and pick-and-place nozzles, boosting both manual and automated throughput.
   • Adds only 0.8 – 2.0 mm to stack height (M3 – M24 range), allowing retrofit without switching to longer fasteners or altering pocket depths.
4. Verified Quality & Long-Term Durability
   • 100 % dimensional and hardness inspection—free height, gap width, concentricity ≤ 0.05 mm TIR, spring rate—all recorded with Cp/Cpk ≥ 1.33 for ISO 9001, IATF 16949, and AS 9100 audits.
   • Post-plating bake relieves hydrogen embrittlement risk, safeguarding tensile integrity for safety-critical joints.
   • Duplex-coated variants (zinc + epoxy powder) withstand 1 000-h xenon-arc weathering without flaking or color shift, ideal for outdoor, marine, or mildly chemical environments.
   • QR-coded packaging links every lot to melt chemistry, heat-treat and plating batches, and mechanical test reports, ensuring full traceability for aerospace, medical-device, and infrastructure projects.